I don’t mean to hijack this thread - I apologize in advance - but this is not unique to UE5. A large number of World of Warcraft players are seeing similar corruption in DX12 mode; for example:
- Severe texture corruption - Bug Report - World of Warcraft Forums (blizzard.com)
- How can I fix this texture glitch? : wow (reddit.com)
I’ve also had this issue appear in Atomic Heart once (which is a UE4 title), but I believe this was when a copy of WoW was running in the background.
Has anyone been able to reproduce this issue on a Radeon or Intel card?
Also, if you have WoW installed, an easy way to reproduce it is to dual-box 2 accounts. After about 20-30 minutes, it’s almost guaranteed. I’m on a 3070, so I have 8GB VRAM. With no games open, but some browser apps open (Chrome, CurseForge, Discord, etc) open, I tend to be around 20% VRAM usage. One copy of WoW alone will eventually experience the issue, but two copies reaches nearly-full VRAM very quickly. Meanwhile, the textures on-disk are good - a restart of WoW can show the same scenes fine.
As such, I suspect this is a memory pressure/texture loading issue - perhaps some VRAM is being deallocated but not written to before texture decompression? It might be less about total VRAM usage and more about allocation/deallocation or multiple requests at once?